Re: How many times should you urinate a day?
I believe what is considered to be normal urination per 24 hours is on the order of 1.5 - 2.0 liters. One ounce = 29.57 milliliters so 1.5 - 2.0 liters (1500 - 2000 milliliters) equals 50.7 - 67.6 fluid ounces. I have recently done creatinine clearance tests where I was asked to carefully collect all urine over 24 hours. The first time I did so the total collection was 1.6 liters (over 24 hours) and the second time the total collection was 1.76 liters (again, over 24 hours).
You asked about urinating (excessively) at night. That is called "nocturia". Do a search on that word and you will find countless documents discussing the various possible causes. I began having heavy urination at night last summer and it was later discovered I have renal artery stenosis (blocked renal artery) in one kidney that had (in the summer) triggered high blood pressure as that one kidney began putting out large amounts of a hormone called renin to try to turn up the supply of blood to that kidney. Diabetes is another possible cause of increased urination at night. Advancing age is yet another possible reason as the kidneys begin to lose the capability to concentrate urine while we sleep, something that just happens with aging... And there are many other possible causes... Again, just do a search on "nocturia"... Hope that info is useful...